<template>
  <div class="sub-filter" v-if="filterData && !filterLoading">
    <div class="item">
      <div class="head">品牌：</div>
      <div class="body">
        <a
          :class="{ active: filterData.selectedBrand === brand.id }"
          @click="filterData.selectedBrand = brand.id"
          href="javasript:;"
          v-for="brand in filterData.brands"
          :key="brand.id"
          >{{ brand.name }}</a
        >
      </div>
    </div>
    <div class="item" v-for="p in filterData.saleProperties" :key="p.id">
      <div class="head">{{ p.name }}：</div>
      <div class="body">
        <a
          :class="{ active: p.selectedProp === attr.id }"
           @click="p.selectedProp = attr.id"
          href="javasript:;"
          v-for="attr in p.properties"
          :key="attr.id"
          >{{ attr.name }}</a
        >
      </div>
    </div>
  </div>
  <div v-else class="sub-filter">
    <XtxSkeleton class="item" width="800px" height="40px" />
    <XtxSkeleton class="item" width="800px" height="40px" />
    <XtxSkeleton class="item" width="600px" height="40px" />
    <XtxSkeleton class="item" width="600px" height="40px" />
    <XtxSkeleton class="item" width="600px" height="40px" />
  </div>
</template>
<script>
import { ref, watch } from "vue";
import { useRoute } from "vue-router";
import { findSubCategoryFilter } from "@/api/category";
export default {
  name: "SubFilter",
  setup() {
    const route = useRoute();
    const filterData = ref(null);
    const filterLoading = ref(false);
    watch(
      () => route.params.id,
      (newVal) => {
        // 当你从二级分类去顶级分类也会拿到ID，不能去加载数据因为它不是二级分类的ID
        if (newVal && route.path === "/category/sub/" + newVal) {
          filterLoading.value = true;
          newVal &&
            findSubCategoryFilter(route.params.id).then(({ result }) => {
              // 品牌全部
              result.selectedBrand = null;
              result.brands.unshift({ id: null, name: "全部" });
              // 销售属性全部
              result.saleProperties.forEach((p) => {
                p.selectedProp = null;
                p.properties.unshift({ id: null, name: "全部" });
              });
              filterData.value = result;
              filterLoading.value = false;
            });
        }
      },
      {
        immediate: true,
      }
    );
    return { filterData,filterLoading };
  },
};
</script>
<style scoped lang='less'>
.xtx-skeleton {
      padding: 10px 0;
    }
// 筛选区
.sub-filter {
  background: #fff;
  padding: 25px;
  .item {
    display: flex;
    line-height: 40px;
    .head {
      width: 80px;
      color: #999;
    }
    .body {
      flex: 1;
      a {
        margin-right: 36px;
        transition: all 0.3s;
        display: inline-block;
        &.active,
        &:hover {
          color: @xtxColor;
        }
      }
    }
  }
}
</style>